Fs = 44100; %音频信号采样率
dt = 1.0/Fs; %采样周期
T = 4; %声音播放长度为4秒
N = T/dt; %采样点数
t = [0:N-1]*dt; %时间向量
x = 0.3*sin(2*pi*300*t); %300Hz音频信号
subplot(2,2,1)
plot(t,x); %画图
axis([0,0.01,-0.5,0.5]); %调整数轴
p1=audioplayer(x,Fs); %声音播放
play(p1)
pause(5)
y1 = 0.1*randn(1,length(t)); %高斯白噪声生成
subplot(2,2,2)
plot(t,y1);
axis([0,0.01,-0.5,0.5]);
p2=audioplayer(y1,Fs);
play(p2)
subplot(2,2,3)
hist(y1,100);
y2=x + y1;
subplot(2,2,4)
plot(t,y2);
axis([0,0.01,-0.5,0.5]);
p4=audioplayer(y2,Fs);
play(p4)